drivers/i2c/Kconfig

   1 #
   2 # I2C subsystem configuration
   3 #
   4
   5 menuconfig I2C
   6         tristate "I2C support"
   7         depends on !S390
   8         select RT_MUTEXES
   9         ---help---
  10           I2C (pronounce: I-squared-C) is a slow serial bus protocol used in
  11           many micro controller applications and developed by Philips.  SMBus,
  12           or System Management Bus is a subset of the I2C protocol.  More
  13           information is contained in the directory <file:Documentation/i2c/>,
  14           especially in the file called "summary" there.
  15
  16           Both I2C and SMBus are supported here. You will need this for
  17           hardware sensors support, and also for Video For Linux support.
  18
  19           If you want I2C support, you should say Y here and also to the
  20           specific driver for your bus adapter(s) below.
  21
  22           This I2C support can also be built as a module.  If so, the module
  23           will be called i2c-core.
  24
  25 if I2C
  26
  27 config I2C_BOARDINFO
  28         boolean
  29         default y
  30
  31 config I2C_COMPAT
  32         boolean "Enable compatibility bits for old user-space"
  33         default y
  34         help
  35           Say Y here if you intend to run lm-sensors 3.1.1 or older, or any
  36           other user-space package which expects i2c adapters to be class
  37           devices. If you don't know, say Y.
  38
  39 config I2C_CHARDEV
  40         tristate "I2C device interface"
  41         help
  42           Say Y here to use i2c-* device files, usually found in the /dev
  43           directory on your system.  They make it possible to have user-space
  44           programs use the I2C bus.  Information on how to do this is
  45           contained in the file <file:Documentation/i2c/dev-interface>.
  46
  47           This support is also available as a module.  If so, the module
  48           will be called i2c-dev.
  49
  50 config I2C_MUX
  51         tristate "I2C bus multiplexing support"
  52         depends on HAS_IOMEM
  53         help
  54           Say Y here if you want the I2C core to support the ability to
  55           handle multiplexed I2C bus topologies, by presenting each
  56           multiplexed segment as a I2C adapter.
  57
  58           This support is also available as a module.  If so, the module
  59           will be called i2c-mux.
  60
  61 source drivers/i2c/muxes/Kconfig
  62
  63 config I2C_HELPER_AUTO
  64         bool "Autoselect pertinent helper modules"
  65         default y
  66         help
  67           Some I2C bus drivers require so-called "I2C algorithm" modules
  68           to work. These are basically software-only abstractions of generic
  69           I2C interfaces. This option will autoselect them so that you don't
  70           have to care.
  71
  72           Unselect this only if you need to enable additional helper
  73           modules, for example for use with external I2C bus drivers.
  74
  75           In doubt, say Y.
  76
  77 config I2C_SMBUS
  78         tristate "SMBus-specific protocols" if !I2C_HELPER_AUTO
  79         help
  80           Say Y here if you want support for SMBus extensions to the I2C
  81           specification. At the moment, the only supported extension is
  82           the SMBus alert protocol.
  83
  84           This support is also available as a module.  If so, the module
  85           will be called i2c-smbus.
  86
  87 source drivers/i2c/algos/Kconfig
  88 source drivers/i2c/busses/Kconfig
  89
  90 config I2C_STUB
  91         tristate "I2C/SMBus Test Stub"
  92         depends on m
  93         default 'n'
  94         help
  95           This module may be useful to developers of SMBus client drivers,
  96           especially for certain kinds of sensor chips.
  97
  98           If you do build this module, be sure to read the notes and warnings
  99           in <file:Documentation/i2c/i2c-stub>.
 100
 101           If you don't know what to do here, definitely say N.
 102
 103 config I2C_DEBUG_CORE
 104         bool "I2C Core debugging messages"
 105         help
 106           Say Y here if you want the I2C core to produce a bunch of debug
 107           messages to the system log.  Select this if you are having a
 108           problem with I2C support and want to see more of what is going on.
 109
 110 config I2C_DEBUG_ALGO
 111         bool "I2C Algorithm debugging messages"
 112         help
 113           Say Y here if you want the I2C algorithm drivers to produce a bunch
 114           of debug messages to the system log.  Select this if you are having
 115           a problem with I2C support and want to see more of what is going
 116           on.
 117
 118 config I2C_DEBUG_BUS
 119         bool "I2C Bus debugging messages"
 120         depends on HAS_IOMEM
 121         help
 122           Say Y here if you want the I2C bus drivers to produce a bunch of
 123           debug messages to the system log.  Select this if you are having
 124           a problem with I2C support and want to see more of what is going
 125           on.
 126
 127 endif # I2C